Safety lock for house door or other doors
A safety lock and safety device technology, applied in the field of safety locks
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[0024] In Fig. 1, reference numeral 1 generally denotes a safety lock, which comprises a hard shell 2 made of sheet metal, in which a lock cylinder is detachably mounted, which may be denoted by A and includes double teeth The type of mechanism, or the type represented by B, includes a rotary cylinder lock mechanism.
[0025] The general structure of safety lock 1 and cylinder A with double-tooth mechanism may for example be of the type shown in Italian Patent No. 1295464 of the applicant. For the convenience of the reader, this general structure is schematically described below.
[0026] Referring again to FIGS. 3 and 4 , the hard metal shell 2 includes two main parallel planes 3 and 4 , a top edge 5 , a bottom edge 6 and two opposing sides 7 and 8 . In the inside of the hard shell 2, a locking bolt 9 (referring to Fig. 3 and Fig. 4) is slidably installed, and the locking bolt also includes a flat plate 10 with an edge 10a bent into an L shape in addition, and four welding h...
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